Bug 506183

Summary: On X11, Nightcolor doesn't work anymore
Product: [Plasma] kwin Reporter: Guido <guido.iodice>
Component: night colorAssignee: KWin default assignee <kwin-bugs-null>
Status: RESOLVED UPSTREAM    
Severity: normal CC: guido.iodice, nate
Priority: NOR Keywords: regression, X11-only
Version First Reported In: 6.4.0   
Target Milestone: ---   
Platform: Other   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:

Description Guido 2025-06-25 20:35:33 UTC 
SUMMARY
On X11, Nightcolor doesn't work anymore. I assume it depends on the Wayland / X11 separation

STEPS TO REPRODUCE
1. Set night color in system settings at the current hour.

OBSERVED RESULT
Night color is not activated


EXPECTED RESULT
Night color should be activated


SOFTWARE/OS VERSIONS
Operating System: Manjaro Linux 
KDE Plasma Version: 6.4.1
KDE Frameworks Version: 6.15.0
Qt Version: 6.9.1
Kernel Version: 6.16.0-rc3-1-MANJARO (64-bit)
Graphics Platform: X11
Processors: 8 × 11th Gen Intel® Core™ i5-1135G7 @ 2.40GHz
Memory: 16 GiB of RAM (15.3 GiB usable)
Graphics Processor: Intel® Iris® Xe Graphics
Comment 1 Guido 2025-06-27 19:27:33 UTC 
It seems that the problem stems from a configuration I had for the modesetting driver; disabling it made it work again.

#Option      "UseGammaLUT" "true"

Strangely, it gave no problems before.